ipviking use it on c#

WebRequest request = WebRequest.Create("http://beta.ipviking.com/api/&apikey=** REMOVED **&method=ipq&ip=202.104.251.200");
request.Method = "POST";

string postData = "D={\"requests\":[{\"C\":\"Gpf_Auth_Service\", \"M\":\"authenticate\", \"fields\":[[\"name\",\"value\"],[\"Id\",\"\"],[\"username\",\"user@example.com\"],[\"password\",\"ab9ce908\"],[\"rememberMe\",\"Y\"],[\"language\",\"en-US\"],[\"roleType\",\"M\"]]}],  \"C\":\"Gpf_Rpc_Server\", \"M\":\"run\"}";
byte[] byteArray = Encoding.UTF8.GetBytes(postData);

request.ContentType = "application/x-www-form-urlencoded";

request.ContentLength = byteArray.Length;

Stream dataStream = request.GetRequestStream();

dataStream.Write(byteArray, 0, byteArray.Length);

dataStream.Close();

WebResponse response = request.GetResponse();

dataStream = response.GetResponseStream();

StreamReader reader = new StreamReader(dataStream);

string responseFromServer = reader.ReadToEnd();

Console.WriteLine(responseFromServer);

reader.Close();
dataStream.Close();
response.Close();
return View();